Will a 6hp pressure washer engine work on a tractor?

Hi alll new to the forum and i just have one question. I have mid 90s craftsman that i bought for the motor (it will be used on another project) this left me a perfecly good mower chassis. i have an old 6hp motor from a pressure washer. is it worth throwing in the tractor? i want somthing that i can use to run through the bush no big rocks or anything to get over but there is some mud and a few good hills. i need it to haul about 100lbs of equipment and myself (250lbs) into the bush. Will this be enough hp or is it a waist of time. what size pully for the motor? the back will be stock i have a 5 inch kicking around that fits the motor